TMD forecasts rain over 60% of Bangkok and nearby areas on October 15–16

The Thai Meteorological Department (TMD) forecasts thundershowers over 60% of Bangkok and surrounding areas for the 24 hours from 6am on October 15, 2026, to 6am on October 16, Thai time. The department also warns of isolated heavy rain in the North, western Central region, East and South.

TMD warns of flash-flood risks in four regions

Residents in the North, western Central region, East and South should beware of thundershowers, gusty winds and heavy or accumulated rainfall during October 15–16, the TMD warned. Flash floods and sudden run-off could affect vulnerable areas, particularly foothill slopes near waterways and low-lying land.

A high-pressure system, or cool air mass, from China covers the upper North, upper Northeast and South China Sea, according to the TMD. The system is driving easterly and southeasterly winds that carry moisture from the South China Sea over Thailand and the Gulf of Thailand.

Regional thundershower coverage ranges from 30% to 60%

The TMD’s October 15–16 forecast puts thundershower coverage at 60% in the Central region, East, South’s east coast, and Bangkok and surrounding areas. Coverage is forecast at 40% in the North and South’s west coast, and 30% in the Northeast.

North: The TMD forecasts thundershowers over 40% of the region during October 15–16, with isolated heavy rain and gusty winds in Tak, Kamphaeng Phet and Phetchabun. Minimum temperatures are expected at 21–25°C and maximum temperatures at 33–36°C, with easterly winds of 10–20 km/h.

Northeast: Thundershowers are forecast over 30% of the region during October 15–16, with isolated gusty winds, mainly in Loei, Chaiyaphum, Nakhon Ratchasima, Buri Ram, Surin, Si Sa Ket and Ubon Ratchathani, according to the TMD. Minimum temperatures are expected at 22–25°C and maximum temperatures at 31–35°C, with easterly winds of 10–25 km/h.

Central region: The TMD’s October 15–16 forecast indicates thundershowers over 60% of the region, with isolated heavy rain in Nakhon Sawan, Uthai Thani, Chai Nat, Suphan Buri, Phra Nakhon Si Ayutthaya, Kanchanaburi and Ratchaburi. Minimum temperatures are expected at 23–25°C and maximum temperatures at 32–34°C, with southeasterly winds of 10–20 km/h.

East: Thundershowers are forecast over 60% of the region during October 15–16, with isolated heavy rain in Nakhon Nayok, Chonburi, Rayong, Chanthaburi and Trat, according to the TMD. Minimum temperatures are expected at 24–26°C and maximum temperatures at 31–35°C, with southeasterly winds of 10–30 km/h. Waves are forecast below 1 metre, rising above 2 metres in thunderstorms.

South, east coast: The TMD forecasts thundershowers over 60% of the area during October 15–16, with isolated heavy rain in Phetchaburi, Surat Thani, Nakhon Si Thammarat, Songkhla, Yala and Narathiwat. Minimum temperatures are expected at 22–25°C and maximum temperatures at 30–35°C, with southeasterly winds of 15–30 km/h. Waves are forecast at around 1 metre, rising above 2 metres in thunderstorms.

South, west coast: The TMD’s Thai-language forecast for October 15–16 indicates thundershowers over 40% of the area, with isolated heavy rain in Ranong, Phang Nga and Satun. Minimum temperatures are expected at 23–26°C and maximum temperatures at 31–35°C, with easterly winds of 15–30 km/h. Waves are forecast at around 1 metre, rising above 2 metres in thunderstorms.

Bangkok and surrounding areas: The TMD forecasts thundershowers over 60% of the area during October 15–16. Minimum temperatures are expected at 25–27°C and maximum temperatures at 33–35°C, with southeasterly winds of 10–20 km/h.

Storm waves could exceed 2 metres in the Andaman Sea and Gulf

Waves in the Andaman Sea and Gulf of Thailand could exceed 2 metres in areas affected by thunderstorms during October 15–16, the TMD warned. Mariners should check their planned routes, navigate cautiously and avoid sailing through thunderstorms.